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Merge pull request #49 from gianm/rowkey-hashing
Rollup-aware partitioning by default for Maps, and a Partitioner interface for other types.
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53 changes: 19 additions & 34 deletions
53
core/src/main/scala/com/metamx/tranquility/beam/HashPartitionBeam.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,44 +1,29 @@ | ||
| /* | ||
| * Tranquility. | ||
| * Copyright 2013, 2014, 2015 Metamarkets Group, Inc. | ||
| * Licensed to Metamarkets Group Inc. (Metamarkets) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. Metamarkets licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * Unless required by applicable law or agreed to in writing, | ||
| * software distributed under the License is distributed on an | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| * KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
|
|
||
| package com.metamx.tranquility.beam | ||
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|
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| import com.google.common.hash.Hashing | ||
| import com.metamx.common.scala.Logging | ||
| import com.twitter.util.Future | ||
| import com.metamx.tranquility.partition.HashCodePartitioner | ||
|
|
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| /** | ||
| * Partitions events based on their hashCode modulo the number of delegate beams, and propagates the partitioned events | ||
| * via the appropriate beam. | ||
| */ | ||
| class HashPartitionBeam[A]( | ||
| val delegates: IndexedSeq[Beam[A]] | ||
| ) extends Beam[A] with Logging | ||
| beams: IndexedSeq[Beam[A]] | ||
| ) extends MergingPartitioningBeam[A](new HashCodePartitioner[A], beams) | ||
| { | ||
| def propagate(events: Seq[A]) = { | ||
| val futures = events.groupBy(event => Hashing.consistentHash(event.hashCode, delegates.size)) map { | ||
| case (i, group) => | ||
| delegates(i).propagate(group) | ||
| } | ||
| Future.collect(futures.toList).map(_.sum) | ||
| } | ||
|
|
||
| def close() = { | ||
| Future.collect(delegates map (_.close())) map (_ => ()) | ||
| } | ||
|
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| override def toString = "HashPartitionBeam(%s)" format delegates.mkString(", ") | ||
| override def toString = s"HashPartitionBeam(${beams.mkString(", ")})" | ||
| } |
48 changes: 48 additions & 0 deletions
48
core/src/main/scala/com/metamx/tranquility/beam/MergingPartitioningBeam.scala
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| /* | ||
| * Licensed to Metamarkets Group Inc. (Metamarkets) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. Metamarkets licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, | ||
| * software distributed under the License is distributed on an | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| * KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
|
|
||
| package com.metamx.tranquility.beam | ||
|
|
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| import com.metamx.common.scala.Logging | ||
| import com.metamx.tranquility.partition.Partitioner | ||
| import com.twitter.util.Future | ||
|
|
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| /** | ||
| * Partitions events based on the output of a Partitioner, and propagates the partitioned events via the | ||
| * appropriate underlying beams. | ||
| */ | ||
| class MergingPartitioningBeam[A]( | ||
| val partitioner: Partitioner[A], | ||
| val beams: IndexedSeq[Beam[A]] | ||
| ) extends Beam[A] with Logging | ||
| { | ||
| def propagate(events: Seq[A]) = { | ||
| val futures = events.groupBy(partitioner.partition(_, beams.size)) map { | ||
| case (i, group) => | ||
| beams(i).propagate(group) | ||
| } | ||
| Future.collect(futures.toList).map(_.sum) | ||
| } | ||
|
|
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| def close() = { | ||
| Future.collect(beams map (_.close())) map (_ => ()) | ||
| } | ||
|
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| override def toString = s"MergingPartitioningBeam(${beams.mkString(", ")})" | ||
| } |
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